Great thread - just to confirm - The dropped valve seat only happens on the 2.0 SPI right? I've got a SPI and ZTS (DOHC) - thinking I should sell the SPI before I experience the joy that other's have with a dropped valve? I don't have the cash to rebuild it or drop in a Zetec... Might be best to sell it? What do you all think? I've got just over 123k on it...